Signaling system.



E. R. GILL;

SIGNALING SYSTEM.

APPLICATION FILED APR. 5, 1911.

1,924,446. Patented Apr. 23,1912.

l as :I3 63 0 w/ TNESSES I 9M- 7 vs TOR '73 j 17 UNITED STATES PATENT OFFTEE.

EDWIN R; GILL, 'OF YONKERS, YORK, ASSIGNO-R, BY MESNE ASSIGNMENTS, TO

HOWARD E. MERRELL, PORT, PENNSYLVANIA.

Original application filed December 8, 1909, Serial No. 532,052.

To all who'm'it may concern:

Be it known that I, EDWIN R. GILL, re-

r .Q of an application filed by me December 8th, 190'9, Serial No. 532,0 ;5 2,now Patent No.

1,020,975, issued March 26,T91'2,"selective signaling systems.

One of the objects of the present invention is to provide a convenient method of communicating the correct time simultaneously to various despatchers along a telephone train despatching circuit. 7

Another object is to provide means whereby signals arranged in a telephonic despatching circuit may be operated in consonance with electrical impulses impressed upon a telegraph circuit from the National Observatory or other sending station, thereby enabling the time piece of each despatcher to be periodically standardized.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangements of parts, which will be exemplified in the construction hereinafter described, and the plication of which will be appended claims. 2

In the accompanying drawing, wherein is illustrated a preferred embodiment of my invention, the figure is a diagrammatic view of a referred form thereof.

Re. erring now to thedrawing, the view may be said to illustrate diagrammatically the signaling apparatus, wiring, and signal operating apparatuslocated in the principal train despatchers station, as well as in certain receiving stations of a telephonic train despatchers circuit, said stations being designated respectively A, B and C.- a

1 and 2, respectively, denote opposite sides of a main telephone line, and connected in bridges thereof as indicated at 3, 4, and 5,

are telephones, the receivers of which are scope of the apind icated in the Specification of Letters Patent.

015 NEW YORK, N. 1., AND 031.0 J. HAMLIN, or sME'rH SIGNALING SYSTEM.

Patented Apr. 23, 1912. Divided and this application filed April 5,

Serial No. 619,017.

indicated at 6, 7 and 8. Calling devices for the various telephones along the line are provided in each of the stations, said calling devicesin the magnetos 10, 11 and 12, each magneto being located in a normally open bridge of the telephone line, said bridges being indicated at 13, 14 and 15.

The signaling devices, and other operating mechanisms in each of the receiving stations being similar, but one set thereof need be described in order to impart a clear understanding of the present invention. A

present instance comprising" escription of the apparatus located in station B will accordingly'be given. Leading from the wire 1 of the telephone line is a wire 16, which connects with one terminal of the coil 17, positioned upon one leg of the magnet, the yoke of which is shown at-18, and leading coil is a wire 19. This wire leads to a terminal 20 of the selector illustrated diagrammatically at 21. This selector, which is preferably a structure, such as is described in Letters Patent No. 906,523, issued to me December 15, 1908, includes a magnet 22 and a coil 23 on said magnet, the latter being connected with the terminal 20. Magnet 22 is adapted to operate mechanism (not shown) which causes a contact member 24. to engage with opposed contact member 25 and close a local circuit 26. Included in local circuit 26, in the present instance, is battery 27 and a signal 28 which signal may take the form of an ordinary electric call bell. Coil 23 is connected with the terminal 30 of the selector, and from this terminal leads a wire 31 to the terminal of the coil 32 positioned upon the other leg of magnet 18. From the opposite terminal of this coil 32 leads wire 33 to the opposite side 2 of the telephone line. It will thus be seen that the coils 17 and 32 of the magnet 18, as well as the selector 21, are connected in bridge of the telephone line, and in series with each other. I the local circuit 16, may include a coil 34. positioned upon magnet 22, so that when local circuit 26 is closed by selector 21 an induced current will be set up in the main line, the cited; of which will be a buzzing in the various telephone receivers along the telephone line, when the local signal 28 If desired, a portion of a biased bell,

' relay clapper 38, which ing operating keys 48. operated, actuate is operated by the closure of the said local circuit. This buzzing, which constitutes an answer back, will inform the operator that the local signal operating circuit has been closed by the operation of the selector.

denotes a polarized armature, which coeperates with the poles 36, 37 of the magnet 18. -Armature 35' is provided with a is adapted to co-actwith the bells 40, 41 to sound the signal. In the present embodiment of my invention, the armature 35 is held in constant engagement with one of the poles of the magnet 18, in the present instance pole a spring 39, such construction constituting well known in the art. comprising coils 43 The coils 43 of this are included in a local circuit 45, which is provided with a battery 46, and included in this local circuit is a sender box 47, hav- These keys, when mechanism (notshown), to impress impulses of a predetermined character upon the local circuit 45, thereby operating the relay- 42, the armature of which is connected as by means of a wire 49 with the wire 50 of the side 2 of the telephone line, an impedance coilas at provided in this wire, and a condenser as at 42 indicates a relay and an armatnre44.

52 being also provided therein between the sides 1 and 2 of the telephone line. The contact member 53 with which cotiperates the armature 44 of the relay '42 is connected by means of the wires 54 and 55 with the terminal 56 of the pole changer 57. Leading from the opposite pole 58 of the pole chan er 57 is a wire 60, which extends to the side 1 of the telephone line and includes The'pole changer 57 63. A wire 64 shown in dotted lines connects terminals 56'and 63, and av Wire 65 similarly connects the terminals 58 and 62.

66 indicates aswinging member comprising the arms 67 and 68, the point of pivotal connection of which is in electrical connection with the positive respectively, of the battery 70, as by means of the wires 69 and 71. These points of pivotal connection of the arms 67 and 68 of'the swinging member 66, which are herein shown at 72 and 72, are insulated from each other as will be understood. I

The telegraph line comprises wires 73 and 74 and is connected with double switch arm 75, 76 joined asthat when it is'desired to actuate the biased bells of the various receiving stations, the

swinging of the switch arms 7 5'and 76 to the position shown in the drawing willenable the impulses impressed-upon the telegraph line to actuate the relay-v 42, thereby-causing the battery to impress impulses upon the 1 telephone line according to the following lay 42, wire 36, as by means of I of the relay 42,

51' beingand negative sides,

by means of a link 77,.so.

circuit: Assuming, the reversing switch member 66 to be in the position shown in the drawing ;"from battery 70, wire 71, terminal 72', switch arm 8, terminal 63, wire 64, Wire 55, contact 53, armature 44, of the re.- impedance coil 51 to the side 2 of the telephone line, wire 31, terminal 30, of the selector 21', coil 33 of the selector ma g'net, terminal 20, xvii-e19, .'coil 17, and wire 16 to the side lot the telephone line, thence through impedance coil61, wire 60, terminal 58, wire- 65, switch arm 67, wire 69, back to the battery 70 It will therefore be seen that when the switch arm 66 l is in the'position shown in the drawing, the system is put into such condition as will enable the various biased polarized signals along the line to be operated by the impulses impressed upon the telephone line by. the battery 70, in accordance with the operation which as above described, is operated by impulses impressed upon the telegraph line, the sides of which are indicated at'73 and 74. The impulses, which are sent over the telegraph line, are impressed thereon from the National Observatory at a predetermined time, the object of the invention as stated above being to enable the time pieces of thevarious operators along the line to be periodically standardized. When it is desired to set the system for selective signaling, the switch arm 66 is moved to enable'arms 67 and 68 to engage respectively with contacts 56 and 5.8. This reverses the poles of the battery 70 to the telephone line, and enables keys 48 of the sending apparatus 47 to operate the relay 42 in accordance withthe particular series of codal impulses sent out by the various keys; It willbe understood of course that thence through wire 23, coil32, I

the switch arms 75 and 76 will be moved' I out of electrical engagement with the wires connecting them withthe why 42 when the system is set' for selective signaling. The impulses impressed upon the tele hone line from the sending apparatus 47 will have no eifect upon the armature of the various biased s gnaling devices in the various sending stations inasmuch have been returnedto :the position shown in-the drawing by means of the springs 39, after their actuation bythe telegraphically impressed impulses, and the polarity of the current has been reversed. These impulses as these armatures I will, however, operate the selective signaling apparatus at the: particular station called, whereby the localsignaling circuits, one of which is shown at 26, will be closed and the'signal therein actuated. r

'As'many changes could be made in the.

above construction iand many apparently widely difierent embodiments of this invention could, be'inade without departing from limiting sense. It is the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a also to be understood that the language used in the following claims is intended to and specific features of the invention herein described and all statements of the scope of the invention, which as a matter of language, might be said to fall therebetWee-n.

aving thus described my invention, what claim new and desire to secure by Letters Patent, 1s:

1. In a system of the class described, in

combination With a telephone line, a biased/- signaling device connected in bridge of said line, a battery for applying a current to said line to operate said biased signal, a relay, and a telegraph line, the sides of which are adapted to be connected to said relay, Whereby said biased bell may be operated in accordance with impulses impressed upon the telephone line from said telegraph line.

2. In a system of the class described, .the combination of a telephone line including a sending station and a ing stations, a selector, device connected in bridge of the line, at each of the various stations, a source of current supply, a relay for applying said plurality of receivsource of current to the line, means for imimpulses upon pressing selective signaling the line connected with said relay, a telegraph line adapted to be connected with said relay, and to cause the same to impress .impulses upon the line to actuate said biased of current supplied to the telephone line.

In a system of the class described, the combination with a telephone line, of a selector and a biased signal connected in bridge of the line and in series with each other, a battery for supplying current to said line, and a telegraphically operated relay for applying said battery to the line.

4:. The combination with a telephone line, of a selective signal operator and a biased signal connected in bridge of the lineand in series with each other, a battery for; supplying current to the line, a pole changer for reversing the polarity of said battery to the line, a relay adapted when operated to impress impulses upon the line, means connected with said relay for applying impulses upon the line to operate said selective signaling operator, and a telegraph line adapted to operate said relay to impress impulses upon the line to' operate said biased signal.

5. Thecombination with a telephoneline, of a selector and a biased signal connected in bridge of the line and in series with each other, a local circuit including a signal local signal a biased signaling 'from the battery upon the signaling devices, and means for reversing c. the polarity ot the source adapted to be closed by the operation of said selector, a telegraph line, sending apparatus, a relay common to said telegraph combination with a line including a sending station and a tions, a selector and a biased signal connected in bridge of the line in each of the various receiving stations, said selector and said biased signal being connected in series with .each other, a local circuit including a located in-each station adapted to be closed by the operation of the selector therein, a battery, a pole changer for reversing the polarity of a relay for applying said battery to said line to operate a selector in certain of said stations to the exclusion of others, or to operate the biased signals in all of saidstations, the particular sets of apparatus operated being determined by the polarity of the battery with respect to the line, apparatus inthe sending station for operatin said relay to impress impulses upon the line to operate said selectors, and a telegraph line adapted to be connected to said relay and to cause the same to impress impulses line and to operate said biased the battery to the line is reversed.

In a system of the class described, the combination with a line including a sending and a plurality of receiving stations, of a battery for supplying current to the line, a pole changer for reversing the polarity of the battery to the line, a relay for impressing impulses of different polarities to the line, a selector, a biased bell connected in bridge of the line in each of the various receiving stations, said selector and said biased bell being connected in series with each other, a local signal in each of the various stations, the operation of which is determined by the selector in that station, means in the sending station for operating said relay to cause the same to impress impulses of a determined polarity to the line to operate said selector, and a telegraph line connected with said relay, adapted when the polarity of said battery to the line is reversed to cause said relay to apply impulses from the battery to the'line tooperate said biased signals. a

8. In a signaling system, in combination, a telephone line, a polarized signal in bridge of the telephone line, a battery adapted to be applied to the telephone line, a telegraph line, a relay actuated by impulses impressed upon the telegraph line adapted to apply said battery to said telephone line, and means independent of said relay for sending apparatus, a battery.

the battery to the line,

signals when the polarity of' v closed by said selector,

changing the polarity of said battery with respect to said line,

9. In a signaling system, in combination, a telephone line, a' signal comprising a bell connected in bridge of the telephone line, a selector in said bridge, a local circuit comprising a battery and a signal adapted to be a battery, means i for applying said battery to said telephone line to operate the selector whereby said local circuit will be closed and said second mentioned signal operated, a telegraph line, a relay adapted to be actuated by impulses impressed upon the telegraph line for ap-- plying said battery to said line, and means 5 independent-of said relay for reversing the polarity of said battery with respectto said linewhereby when said relay is operated said first mentioned signal will be operated.

In testimony whereof I have affixed my 20 signature. in the presence of twowitnessesf EDWIN R. GILL.

Witnesses A, S. Homo-scene, M. A. BUSCI-IER.

v o Copies of this patent inay be obtained for live cents each, by addressing the Commissioner inf-Patents. Washington, D C. 7 

